Non struct supported openai models - r `ellmer::batch_chat_structured()` useful error message?

[rkrug]

Hi
I am testing some code and anted to use a "cheaper" openai model with batch_chat_structured. But I only found gpt-4o to be working (the others gave the cryptic error message

Error in `rlang::abort()`:
! `call` must be a call or environment, not a function.
Hide Traceback
     ▆
  1. ├─dplyr::bind_rows(...)
  2. │ └─rlang::list2(...)
  3. └─ellmer::batch_chat_structured(...)
  4.   └─BatchJob$new(...)
  5.     └─ellmer (local) initialize(...)
  6.       └─self$check_hash(state$hash, call = call)
  7.         └─cli::cli_abort(...)
  8.           └─rlang::abort(call = call)
  9.             └─rlang:::validate_signal_args(...)
 10.               └─rlang:::stop_input_type(...)
 11.                 └─rlang::abort(message, ..., call = call, arg = arg)
>

In parallel_chat_structured, I get the much more useful error message

Error in `req_perform_parallel()`:
! HTTP 400 Bad Request.
• Invalid parameter: 'response_format' of type 'json_schema' is not supported with this model. Learn more about supported models at the Structured Outputs guide: [https://platform.openai.com/docs/guides/structured-outputs](vscode-file://vscode-app/Applications/Positron.app/Contents/Resources/app/out/vs/code/electron-sandbox/workbench/workbench.html#)

It would be great the error message could be a bit more informative.

Also, a check in advance for the capabilities of the model would be useful.

Thanks,

Rainer

[hadley]

For future reference, this sort of problem is much easier for me to diagnose if your provide a reprex. Fortunately I had seen this problem before.